It seems that almost at random, the dock and the applications listed there, and even the hotcorners, all freeze up.

I can still click on the window I'm on, but going between programs, using the hotcorners, clicking on programs on the dock, all but freeze for maybe 30 seconds, then o back to normal. Sometimes though, that doesn't happen, and I can't get anything to work right...

Beyond that though, the rest of the system works fine.

Can anyone help me out?